Conventions

In this book, you will find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Data deletion in HBase can happen for a single row or in the form of a batch representing multiple rows using the following method of the HTable class."

A block of code is set as follows:

List<Delete> deletes = new ArrayList<Delete>();
Delete delete1 = new Delete(Bytes.toBytes("row-1"));
delete1.deleteColumn(Bytes.toBytes("cf1"), Bytes.toBytes("greet"));
deletes.add(delete1);

Any command-line input or output is written as follows:

[root@localhost hbase-0.98.7-hadoop2]# bin/hbase shell
hbase(main):001:0> help 'create'

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "Click on return to see a listing of the available shell commands and their options."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.